...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of earthquake engineering >Seismic assessment of existing RC buildings under alternative ground motion ensembles compatible to EC8 and NTC 2008
【24h】

Seismic assessment of existing RC buildings under alternative ground motion ensembles compatible to EC8 and NTC 2008

机译：在兼容EC8和NTC 2008兼容EC8和NTC的替代地面行动集合下对现有RC建筑的地震评估

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This work investigates the effects of the choice of different ensembles of ground motions on the seismic assessment of existing RC buildings through nonlinear dynamic analysis. Nowadays indeed, all the main International Seismic Codes provide a soil classification which is based on the shear wave velocity, the soil morphology and the assumed distance from the fault source. Depending on the soil properties, a suitable elastic spectrum is provided as target, defined on the basis of average properties assumed for the soil. An ensemble of ground motions, compatible to the target one, must be selected to perform a nonlinear dynamic analysis. The ensemble can be made by artificial or natural ground motions, compatible with the Code spectrum for the assumed soil-type. Alternatively, the set of ground motions can be assumed as compatible with the bedrock Code spectrum and, subsequently, subjected to site response analysis, i.e. filtered through the specific stratigraphy of the site soil. In this work a comparison among these different approaches, all compatible to the European (Eurocode 8, EC8) and Italian (NTC 2008) Code provisions, has been made on a case-study, i.e. a real RC Italian building. The seismic response of the case-study under the assumed seismic inputs, expressed in terms of chord rotation and shear force, has been found by performing a nonlinear dynamic analysis under the different assumed seismic excitations. The comparison has been made in terms of seismic performance, expressed as the ratio between the seismic response found for each structural element and the corresponding capacity. The comparison among the seismic performance found by the application of the different ground motion ensembles pointed out significant differences, which underline the importance of the seismic input choice in the seismic assessment of RC buildings.
机译：本文通过非线性动力分析研究了不同地震动组合的选择对现有钢筋混凝土建筑抗震评估的影响。事实上，目前所有主要的国际地震规范都提供了基于剪切波速、土壤形态和与断层源的假定距离的土壤分类。根据土壤性质，提供一个合适的弹性谱作为目标，根据土壤的平均假定性质进行定义。必须选择与目标地震动兼容的地震动集合，以执行非线性动力学分析。集合可以通过人工或自然地面运动进行，与假定土壤类型的代码谱兼容。或者，可以假设地震动集与基岩规范谱兼容，并随后进行场地响应分析，即通过场地土壤的特定地层进行过滤。在这项工作中，对这些不同的方法进行了比较，所有这些方法都符合欧洲（欧洲规范8，EC8）和意大利（NTC 2008）规范的规定，并对一个案例研究进行了比较，即一座真正的RC意大利建筑。通过在不同假设地震激励下进行非线性动力分析，发现了案例研究在假设地震输入下的地震响应，以弦旋转和剪力表示。根据抗震性能进行了比较，表示为每个结构元件的地震响应与相应承载力之间的比率。通过对不同地震动组合的应用所发现的抗震性能进行比较，指出了显著差异，这突出了地震输入选择在钢筋混凝土建筑抗震评估中的重要性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号